I masturbated thinking about my step-niece at home

With this whole story of my wife having invited my step-niece to live in our house, seeing her all charming and very sexy walking around the house with these curved clothes that enhance her natural and perfect curves even more, always with lingerie well tucked in her ass, I end up losing my mind and in addition to eating my wife thinking about my step-niece, I also masturbate all the time imagining her with her mouth on my rod and sitting all naked.